/**
 * Copyright IBM Corporation 2017
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 **/

import Foundation

enum Result<T, Error> {
    case success(T)
    case failure(Error)
}

let cache = NSCache<AnyObject, AnyObject>()
let CRLF = "\r\n"

extension String {
    var base64Encoded: String {
        return Data(utf8).base64EncodedString()
    }

    var mimeEncoded: String? {
        guard let encoded = addingPercentEncoding(withAllowedCharacters: .urlQueryAllowed) else {
            return nil
        }
        let quoted = encoded
            .replacingOccurrences(of: "%20", with: "_")
            .replacingOccurrences(of: ",", with: "%2C")
            .replacingOccurrences(of: "%", with: "=")
        return "=?UTF-8?Q?\(quoted)?="
    }
}
